The gold standard in safe sleep. Designed to eliminate the need for loose blankets in the crib, the ThermalSnug™ is made with a double layer of organic cotton and hypoallergenic bamboo fiber. Available in different rigorously tested thermal ratings (TOG), it keeps your baby at the perfect temperature during chilly nights or British summers. It features a smart two-way zipper for quick and quiet diaper changes in the middle of the night, without waking the little one.